Question

a closed, two-dimensional shape with straight sides is called a
a triangle where all sides are of equal length is known as an
triangle.
a triangle with two sides of equal length is called an
triangle.
a triangle with no sides of equal length is called a
triangle.
in geometry, any four - sided closed shape is called a

Explanation:

• A closed, two - dimensional shape with straight sides is called a polygon.
• A triangle where all sides are of equal length is known as an equilateral triangle.
• A triangle with two sides of equal length is called an isosceles triangle.
• A triangle with no sides of equal length is called a scalene triangle.
• In geometry, any four - sided closed shape is called a quadrilateral.

Answer:

polygon, equilateral, isosceles, scalene, quadrilateral